R=raza bazei; R=5cm=0,05m
H=inaltimea cutiei; H=6cm=0,06m
N=numarul cutiilor; N=5000000
Sb=suprafata bazei
Sl=suprafata laterala
Cutia are doua baze.
S=suprafata totala
S=Sl+2Sb
Sb=πR²
L=lungimea bazei(cercului)
L=2πr
Sl=L×H
Sl=2πRH
S=Sl+2Sb=2πRH+2πR²=2πR(H+R)
S=2×3,14×0,05(0,06+0,05)=0,314×0,11=0,03454m²
Sc=suprafata totala corectata cu 13%
Sc=0,13×S+S=S(1+0,13)=S×1,13
Sc=0,03454×1,13=0,0390302m²
St=suprafata totala a tablei utilizate
St=Sc×N
St=0,0390302×5000000=195151m²